修改图表中的数据标志是通过图表区格式选项中的数据标志选项实现的。
参考答案：错
Laura was happy ____ by so many kind-hearted friends when she had a serious operation in hospital.
A．to support
B．to be supported
C．being supported
D．supported
预存室下料位故障使得现象？如何维持生产？
